content: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf;
  
  import static java.util.Arrays.asList;
  
  import com.google.protobuf.Internal.LongList;
  import java.util.Collections;
  import java.util.ConcurrentModificationException;
  import java.util.Iterator;
  import junit.framework.TestCase;
  
  /**
   * Tests for {@link LongArrayList}.
   *
   * @author dweis@google.com (Daniel Weis)
   */
  public class LongArrayListTest extends TestCase {
  
    private static final LongArrayList UNARY_LIST =
        newImmutableLongArrayList(1);
    private static final LongArrayList TERTIARY_LIST =
        newImmutableLongArrayList(1, 2, 3);
  
    private LongArrayList list;
  
    @Override
    protected void setUp() throws Exception {
      list = new LongArrayList();
    }
  
    public void testEmptyListReturnsSameInstance() {
      assertSame(LongArrayList.emptyList(), LongArrayList.emptyList());
    }
  
    public void testEmptyListIsImmutable() {
      assertImmutable(LongArrayList.emptyList());
    }
  
    public void testMakeImmutable() {
      list.addLong(3);
      list.addLong(4);
      list.addLong(5);
      list.addLong(7);
      list.makeImmutable();
      assertImmutable(list);
    }
  
    public void testModificationWithIteration() {
      list.addAll(asList(1L, 2L, 3L, 4L));
      Iterator<Long> iterator = list.iterator();
      assertEquals(4, list.size());
      assertEquals(1L, (long) list.get(0));
      assertEquals(1L, (long) iterator.next());
      list.set(0, 1L);
      assertEquals(2L, (long) iterator.next());
  
      list.remove(0);
      try {
        iterator.next();
        fail();
      } catch (ConcurrentModificationException e) {
        // expected
      }
  
      iterator = list.iterator();
      list.add(0, 0L);
      try {
        iterator.next();
        fail();
      } catch (ConcurrentModificationException e) {
        // expected
      }
    }
  
    public void testGet() {
      assertEquals(1L, (long) TERTIARY_LIST.get(0));
      assertEquals(2L, (long) TERTIARY_LIST.get(1));
      assertEquals(3L, (long) TERTIARY_LIST.get(2));
  
      try {
        TERTIARY_LIST.get(-1);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
  
      try {
        TERTIARY_LIST.get(3);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
    }
  
    public void testGetLong() {
      assertEquals(1L, TERTIARY_LIST.getLong(0));
      assertEquals(2L, TERTIARY_LIST.getLong(1));
      assertEquals(3L, TERTIARY_LIST.getLong(2));
  
      try {
        TERTIARY_LIST.get(-1);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
  
      try {
        TERTIARY_LIST.get(3);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
    }
  
    public void testSize() {
      assertEquals(0, LongArrayList.emptyList().size());
      assertEquals(1, UNARY_LIST.size());
      assertEquals(3, TERTIARY_LIST.size());
  
      list.addLong(3);
      list.addLong(4);
      list.addLong(6);
      list.addLong(8);
      assertEquals(4, list.size());
  
      list.remove(0);
      assertEquals(3, list.size());
  
      list.add(17L);
      assertEquals(4, list.size());
    }
  
    public void testSet() {
      list.addLong(2);
      list.addLong(4);
  
      assertEquals(2L, (long) list.set(0, 3L));
      assertEquals(3L, list.getLong(0));
  
      assertEquals(4L, (long) list.set(1, 0L));
      assertEquals(0L, list.getLong(1));
  
      try {
        list.set(-1, 0L);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
  
      try {
        list.set(2, 0L);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
    }
  
    public void testSetLong() {
      list.addLong(1);
      list.addLong(3);
  
      assertEquals(1L, list.setLong(0, 0));
      assertEquals(0L, list.getLong(0));
  
      assertEquals(3L, list.setLong(1, 0));
      assertEquals(0L, list.getLong(1));
  
      try {
        list.setLong(-1, 0);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
  
      try {
        list.setLong(2, 0);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
    }
  
    public void testAdd() {
      assertEquals(0, list.size());
  
      assertTrue(list.add(2L));
      assertEquals(asList(2L), list);
  
      assertTrue(list.add(3L));
      list.add(0, 4L);
      assertEquals(asList(4L, 2L, 3L), list);
  
      list.add(0, 1L);
      list.add(0, 0L);
      // Force a resize by getting up to 11 elements.
      for (int i = 0; i < 6; i++) {
        list.add(Long.valueOf(5 + i));
      }
      assertEquals(
          asList(0L, 1L, 4L, 2L, 3L, 5L, 6L, 7L, 8L, 9L, 10L),
          list);
  
      try {
        list.add(-1, 5L);
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
  
      try {
        list.add(4, 5L);
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
    }
  
    public void testAddLong() {
      assertEquals(0, list.size());
  
      list.addLong(2);
      assertEquals(asList(2L), list);
  
      list.addLong(3);
      assertEquals(asList(2L, 3L), list);
    }
  
    public void testAddAll() {
      assertEquals(0, list.size());
  
      assertTrue(list.addAll(Collections.singleton(1L)));
      assertEquals(1, list.size());
      assertEquals(1L, (long) list.get(0));
      assertEquals(1L, list.getLong(0));
  
      assertTrue(list.addAll(asList(2L, 3L, 4L, 5L, 6L)));
      assertEquals(asList(1L, 2L, 3L, 4L, 5L, 6L), list);
  
      assertTrue(list.addAll(TERTIARY_LIST));
      assertEquals(asList(1L, 2L, 3L, 4L, 5L, 6L, 1L, 2L, 3L), list);
  
      assertFalse(list.addAll(Collections.<Long>emptyList()));
      assertFalse(list.addAll(LongArrayList.emptyList()));
    }
  
    public void testRemove() {
      list.addAll(TERTIARY_LIST);
      assertEquals(1L, (long) list.remove(0));
      assertEquals(asList(2L, 3L), list);
  
      assertTrue(list.remove(Long.valueOf(3)));
      assertEquals(asList(2L), list);
  
      assertFalse(list.remove(Long.valueOf(3)));
      assertEquals(asList(2L), list);
  
      assertEquals(2L, (long) list.remove(0));
      assertEquals(asList(), list);
  
      try {
        list.remove(-1);
        fail();
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
  
      try {
        list.remove(0);
      } catch (IndexOutOfBoundsException e) {
        // expected
      }
    }
  
    public void testRemoveEndOfCapacity() {
      LongList toRemove = LongArrayList.emptyList().mutableCopyWithCapacity(1);
      toRemove.addLong(3);
      toRemove.remove(0);
      assertEquals(0, toRemove.size());
    }
  
    public void testSublistRemoveEndOfCapacity() {
      LongList toRemove = LongArrayList.emptyList().mutableCopyWithCapacity(1);
      toRemove.addLong(3);
      toRemove.subList(0, 1).clear();
      assertEquals(0, toRemove.size());
    }
  
    private void assertImmutable(LongArrayList list) {
      if (list.contains(1L)) {
        throw new RuntimeException("Cannot test the immutability of lists that contain 1.");
      }
  
      try {
        list.add(1L);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.add(0, 1L);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(Collections.<Long>emptyList());
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(Collections.singletonList(1L));
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(new LongArrayList());
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(UNARY_LIST);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(0, Collections.singleton(1L));
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(0, UNARY_LIST);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addAll(0, Collections.<Long>emptyList());
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.addLong(0);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.clear();
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.remove(1);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.remove(new Object());
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.removeAll(Collections.<Long>emptyList());
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.removeAll(Collections.singleton(1L));
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.removeAll(UNARY_LIST);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.retainAll(Collections.<Long>emptyList());
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.retainAll(Collections.singleton(1L));
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.retainAll(UNARY_LIST);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.set(0, 0L);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
  
      try {
        list.setLong(0, 0);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
    }
  
    private static LongArrayList newImmutableLongArrayList(long... elements) {
      LongArrayList list = new LongArrayList();
      for (long element : elements) {
        list.addLong(element);
      }
      list.makeImmutable();
      return list;
    }
  }
  